Boiler with superheating-tubes.



Np. 823,551.. PATBNTED JUNE 19, S1906. T

' W. SCHMIDT. f

'BUTLER WITH SUPBRHEATING TUBES.-

APPLIGATION FILED JANJS, 1905.

8 SHEETSTSHEET 1.

g db 'qb im@ No. 823,551. l TATBNTED JUNE 19, 190e.

' W.- SCHMIDT.

BUTLER WITH SUPERHEATTNG TUBES. APPLIUATION FILED JAN. 3, 1905.

B SHEETS-SHEBT i2.-

No. 823,551. l v:PM ENTED JUNE 19, 1906.

. l W. SCHMIDT. y

BOILBR AWITH SUPERHEATING TUBES.

APPLIATION FILED JAN. 3,1905. a SHEETS-SHEET a Z 6336-5" n A Ve/Ziff.' M@ X@ Welke )ge/melf y @MW No. 823,551. PATENTED JUNE 19, 1906. A

W. SCHMIDT.l

` BOILBR'WITH SUPER-HEATING TUBES'.

APPLICATION FILED JAN. 3. 1905..

8 SHEETS-SHEET 4.

No. 823.551'. I PATENTE) JUNE'lQ, 1906.

' A l W. 'SCHMIDTI4 BOILER WITH SUPBRHEATING TUBES.

APPLICATION FILED JAN. 3, 1905.

8 SHEETS-SHEET 5.

No. 823,551, PATENTED JUNE 19, 1906.

W. SCHMIDT. BUTLER WITH SUPERHEATING' TUBES.

APPLICATION FILED JAN. 3. 1905. l

` 8 SHEETS-SHEET 6.

No. 823,551. l PATENTED JUNE 19, 1906.

W. SCHMIDT.

BOILER WITH SUPBRHEATING TUBES.

ARILIOATION FILED JAN. 3. 1905.

8 .SHEETS-SHEET 7.

No. 823,551. PATBNTED JUNE 19, 1906. l

y W. SCHMIDT.

BOILER WITH SUPBRHEATING TUBES.

APPLICATION FILED JAN. 1905.

8 SHEETS-SHEET 8.

ff ,l www UNITED STATES PATENT OFFICE.

WILHELM SCHMIDT, oF WiLHELMsHHE, NEAR oAss-EL, GERMANY.

Specification of Letters Iatent.

Patented June 19, 1.906.

Application filed January 3,1905. Serial No. 239.481.

To all t may concern: v l

Be it known that I, WILHELM ScHMrD'I", a subject of the King of Prussia, German Emperor, andk a resident of Wilhelmshhe, near Cassel,` in the Province-of Hesse-Nassau,-

German Empire, have invented certain new and useful f Improvements in Locomotive Tube-Boilers -with Superheating-Tubes, of

` which the following is an exact speciiication.

The improvements hereinafter described, with reference to yseveral forms shown in the drawings, comprise a further development of the invention described in my United States Letters Patent No. 703,482, July 1, 1902, and have the object to remove certaindefects or inconveniences still remaining, especially relating tothe putting together and the taking apart of the apparatus. Y'

` In order to eifect the easy removal and in- 'sertion ofthe superheating-pipes arranged in -the enlarged smoke-tubes of the locomotive-- boiler and forming an outwai'dand return steam-conduit, it is desirable to Increase the vaccess to the connection between ythe superheating-pipe and the two steam chambers v for steam-inlet and steam-outlet, respectively. This led to the idea of still further extending the bendv described inthe aforesaid patent specification for enabling free access to the tubes, so that now thebend is continued into a return-bend ofthe superheating-pipe which terminates in the direction of the smoke-box tube-plate, wherein the tubes are fixed. By

' 4this means the ends of the superheating-pipes are kept clear of each other. They terminate in the upright or upwardly-sloping coverof the steam chamber or casing and can consequently be -conveniently separately iiXed anddisconnected. This is obviously importantin the working of a locomotive-boiler,

because it is then an easymatter, by undoing 'the means for fastening through the smoke box door, .to remove quickly one or other of Iwardly-slanting cover of the steam casing or chamber.

y boiler according to Fig. 6a. tudinal section of a part of the steam-chest' and 'several flue-tubes inl a large scale. Fig.

The joints can also Figure 1 is a longitudinal section of a steam-boiler provided-with the arrangement according to my invention. Fig. 1a is a longitudinal section of a modiied arrangement. F ig; 2 is a front elevation of the boiler according to Fig. 1. Figs. 2, 3, and 3a are erspective views of the superheatingtu es.- Fig. 4 is a perspective view of a superheatertube arranged in one flue-tube.' Fig. 5 is a front view according to Fig. 6. Fig. 6a is a longitudinal section of a tube-boiler provided with a modified arrangement of my steam superheater. Fig. 6b is a front view of the Fig. 6 is a longi- 6c is an upper-view of a superheater element according to Fig. By Fig. 6d is a detail of the steam-chest according to Fig. 6 in a longitudinal section. Fig. 7L is a longitudinal section of a boiler provided with a further. modified arrangement of my steam-superheater. Fig. 7b is .a front view according to Fig. 7a. Fig-7 is a longitudinal section` of the superheater according to Fig. `7il in `a large scale. Fig. 7 is a modified constructional form, partially in a longitudinal -section and partially in side elevation, showing a steamchest having an inclined front Wall.

tubes according to Fig. 7. Fig. 9 is a longitudinal section of a superheater part, show- Figs. S., vand 8u are front views of the superheatering another donstructional form'. Fig. 9a is a front view according to Fig. 9. Fig. 9b is a horizontal section of the steam-chest accord-y ing t0 Fig. 9.

Fig. 1 and Fig. 2 ofthe drawings are longitudinal section and front elevation, respectively, of the simplest arrangement ap lied to a steam-boiler.' 7c is the shell ofthe o'comotive-boiler, and' v the smoke-box tubelate, in which the 'superheating-pipes are ed steam-tight. The tubes in the top row are of enlarged diameter andl contain the superheating-pipes forming outward` and re` turn steam-passages, as described in the afore- TOO said patent specification. l his the outward conduit; 1, the return-conduit for the steam.

Their end bends h and 1'" are now, as'also clearly shown in Fig. 2", bentback'in the direction of the tube-plate 'u and terminate. in the vertical ilange p, parallel with the platee, the

said an e being iiXed-to the cover of the two steam-co lectors p and g', Fig. 17 The -su-l perheating-pipes are thus not secured directly to the said cover, but to a flange p, which in turn is iixed to the cover byone or two screwstuds therein, the nuts m thereon serving to tighten the ilange p on the return-bends h2 and r2 te the cover ot the steam-chambers. A copper ring may be inserted between them for making tight joint; It will be seen that the tightening-nuts m are clear of obstruction and separately accessible from the smoke-box door, so that they can easily be undone or tightened u Q As a modication tihe superheating-pi es h and 1" in Fig. 3 are shown to be somew at loo ed 'or deflected from the straight line.

ig. 3a shows a' modification in perspective view in which lthe superheating-pi es arranged in two smokeepipes, one `unser the other, are fastened in series with one another. By this it is possiblefor the said pipes to be fastened in only one Xing-lange p, thereby reducing the de th of the steam-collectors, This reduction o depth'in the construction is of great imyprtance, as the space in the u per part of t e smoke-box is very limited, t e ower part of same being occu ied by the boiler-tubes. 'In order to be .a le to place several superheater elements under each other, it is hi hly necessaryfto endeavor to whichthe i F1;-

reduce the height of the flange connection. Moreover, by means of this connection, in es are one behind the other, the

number o e fixing parts will also .be re- `duced, and therefore the working and construction simpliiied, which is also of great importance. Fig. 4 shows another construction'of'a single element, inwhich only one nut is required to fasten the cover-plate p -to the steam-casin Further, there are described tWo pairs o superheating-pipes situated in one tube. The steam passes through the pipe h2, situated in the large pipe s', turns at h5 at the rear, and then asses through the pi e 1'3 toward the smo e-boX tubefplate. Aiter the ipe leaves the large' tube it is pref# erable to end it, as shown at 1'4, so that the superheatingpipe has an`enlared loop 1".

It then again enters the enlarge pipe at 1',

turns at 17, and returns a ain toward the smoke-box tube-plate h6. he ipe is there again bent a little outward, as s own in Fig. 5 at hs, and is then taken directly upward, as at h", and terminates in the cover-plate p at 12, being given the rearward bend h2, which is a characteristic feature of the present invention. Fig. 5 shows this arrangement of thev elements in front elevation, three single elements being situated in line with one another Fig. 6 is al and partly covering each other. longitudinal section of the same. t Y' Fig. 5 shows that the ipes h2 and rwhich start from and end at t e` late p, are situated at a certain distance om each other, eater than the distance 4pipe II underneath; A similar turn ta .As is customary and as indicated in Figs. 5

and 6, not one series only of'steam su erheating elements but several," are emp oyed in locomotive-boilers, and as there is only a relatively small space in the upper part of the smoke-box tube-plate it is necessary to arrange, when the number of the superheating elements is increased, that lthe vertical coverplates p, in'which the rearwardly-bent ends 2 and r2 of the superheating-pi es terminate, take up as little space as posslb e. Formerly it wasnot knownh'ow to save space in this respect, and it was necessary to make the connections in a horizontal plate, by whicheasy access was difficult. Constructions, by way 4of example, are shown in two modifications in Fig. -7 in longitudinal section and in Fi 8 in front elevation. The characteristic eature of the arrangement is the connection one behind the other or in'series, and articularly the's eci'al form of the superlieatingpi es. In ig. 7 the superheated steam 1s co lected in the boxp and goes through the rearwardly-bent pi es h2 first into the upper enlafged pipe I. he pipe h terminates in the`rear of the chamber g, from which the ipe 1' starts. This pipe?` is bent at 1" to a arge curve. in .order to enter the enlargied.

place in the ca connection g, and the steamgoes through t e return-pipe r and enters the upper steam-receiving casing g through the bent pipe 1" and the rearwar end r. Here also are two enlarged pipes I and II, connected onebehind the other or in series. The method of leading the stearhthrough the element arranged artly behind the one 'ust described is simi ar to that already descri for the pipes I and II, but is in some respects different.` The steam leaves pl', passes through the lower pipe h, throug the bent '.pipe hf, into the large ipe s', 'leaves again at IOO pen cular superheating-pipes leads at the l u per end into the lower connection-plate p, w le the other series of superheatl -plpes is carried, by means of looping or de ectlng from the straight line, into the upper connectionlate p. Bypthls or'delectlng, whick 4may also be performed as shown 1n Fig. 8, a completely-unsubstructed position for the xing devices is attained and the depth of the front plate of the steam-chamber isv reduced as far as possible.

In Fig. -9 another modification is illustrated in a longitudinal' section. Fig. 9a is a front view of the same modification.

Fi 9b is a detail of the steam-chest. As clear y to be seen, one set of superheating-` tubes is arranged in each enlarged smoke-v xo tube, and two setslof superheating-tubes are brought in connection'so that'the steam to become superheatedpassesfiirst through the first set of -superheating-tubes and then through the second set, after which it rey I5 turns to the steam-chamber g. h

The tubes of every set `of superheatingtubes are arranged horizontally one to another, so that -the lowest part lof the enlarged l smoke-tube is free of the superheating-tubes,

zo by which arrangement the enlarged smoke-v tubes can be easily cleaned. j

The manner of the connection ol the superheating-tubes one with another is easily to be seen from the drawings. By the ari z 5 rangement of only one set of superheatingtubes in the enlargedsmoke-tubes it is possible to reduce the diameter of the enlarged smoke-tubes to the utmost,and thereby to ain room for a sufficient number of not en- 3o arged smoke-tubes s in the front plate of the smoke-box. i Having thus fully describedl the nature of my invention, what I desire yto secure by Letters Patent of the United States is 1. A boiler, with superheating-tubes, arrangedin some enlarged smoke-tubes of the boiler, the ends of the .su erheatingfpi es .being bent backward inl such a manner t iat they are turned backward into the direction 4p ofthe tube-plate ofthe smoke-box.

2. A boiler, with suberheating-tubes, Aarranged in someenlarged smoke-tubes of the boiler, the ends of the su erheatlng-pi es being bent backward in suoli a manner t at "'45- they are turned backward into the direction of the tube-plate Iof the 'smokelb oX, thesingle superheating-tubes consisting of an oiitward and return steam-passage arranged in-an enlarged smoke-tube of the boiler.

3. A boiler, with superheating-tubes, arranged in some enlarged sn1oke-tubes of the boiler, the ends of the su erheating-pi es being bent backward in suoli a manner t at they are turned backward into the direction ofthe tube-plate of the smoke-box, .the single 'superheating-tubes consisting of several 'outward and return steamfpassages arranged in an enlarged smoke-tube of the boiler.l

4: -Av boiler, with superheating-tubes, ar-

6o 'ranged in some enlarged smoke-tubes of the boiler, the ends of the superheatingapipes being bent backward in such a manner that they are turned backward into the direction of the tu'beplate of the smoke-box, the 'ends oi the tubes being tightened to steam-chambers by means, of flanges, firmly attached to the ends of the superheating-tubes, the front of the steam-chamber being in an upright position and dircctedtoward the door ofthe smoke-box of the boiler. n

5. A boiler, with superheating-tubes, ar-

ranged in some enlarged smoke-tubes of the' boiler, the ends of the superheating-pi es being bentbackward in such a manner t at they are' turned backward into the direction of the tube-plate of the smoke-box, the ends of the tubes being tightened to steam-chambers by means of flanges, firmly attached to the ends of the superheating-tub'es, and of fastening vmeans lying in the middle line between the ends ofthe Isuperheating-tubes, the front of the steam-chamber being. in an upright positionl and directed toward' the door of the smoke-'box of the boiler.

v6. A boiler,l with superheating-tubes, arranged in some enlarged smoke-tubes of the boiler, the ends of the suEerheating-pi es being bent backward in suc a manner .t at they are turned backward into the direction ofthe tube-plate ofthe smoke-box, the single superheating-tubes consisting of an outward and return steam-passage arranged in an en-l larged smoke-tube of the boiler, and the ends of these tubes being tightened to steamchambers by means of -iianges firmly attached to the endsotthe-superheating-tubes, and of fastening-screws lying between the endsof the -superheatin'g-tubes, the' front of the steam-chamber being in an upright position and directed toward the door of the smokebox of the boiler.Jr

7. A- boiler, lwith superheating-tubes, alrranged in some enlarged smoke-tubes of the boiler, the ends ofthe suerheating-pipes being bent backward in suc a manner that they are turned backwardinto the direction of the tube-plate of the smoke-box, the single superheating-tubes consisting of several outwarduand return=steampassages 'arranged in an'enlar ed smoke-tube of the boiler, and the ends of t esel tubes being tightened to steamchambers by means of fianges firmly attached to the' ends ofthe superheating-tubes, and of fastening-screws lying between the ends of the superheating-tubes, they front of the steam-chambers being in an upright position and 'directed toward the door of the smoke-box of the boiler. f

8. A boiler, with superheating-tubes, arranged in some enlarged smolgetubes of the A boiler, the ends of the superheating-pi es being bent backward in such a manner t at they are turned. backward into the direction of the tube-plate ofthe smoke-box, the single superheating-tubes consisting of several outward and return steam-passages arranged in' two enlarged smoke-tubes- 9. A boiler, with superheating-tubes, ar-

ranged in. some enlarged smoke-tubes of the' boiler, the ends of the 'superheating-pipes' roo rio

IZO

en essaies;

being bent backwardin such a manner that ther;r are turned backward into the direction of the tube-plate ofthe smoke-box, the single 'superheating-tubes consisting-of several outl.

5 ward and return steamassa es arranged in two enlarged smoke-tu es; te ends of the tubes bein tightened to steam-chambers by means of anges and of fastening-screwsl ing on the middle line between the ends of t e xo superheating-tubes, the front ,of the steamchamber' being in an upright position and directed toward the door of the smoke-box of the boiler.

In witness whereof I have hereunto set my and in the presence of two witnesses.

WILHELM SCHMIDT.

Witnesses WOLDEMAR HAUPT, HENRY HASPER. 

